Disk record



i, W. M

DESK RE PLKCATIOH FQILED NOV 8,1919

Patented Mar 19% R8 M/ I B ATTORNEY I HERBERTRV. arr-721a, or o'nrceeo, ILLINOIS.

1 ms ascent).

reached" To all whomdt may concern: ,4

sists in the combinations, constructions and j Be it known that-I, Hnnnnnrll MEY R,

a" citizen of the United States, and a' resident '3 oif-the' city'of Chicago, in the county of Qook' and-State of'lllinois, have invented a new and ii'seful Improvement in Disk" Records,

of. which the following is a full, clear, and

exact description.

. My invention relatesto improvements in disk records for phonographs, and it conarrangements hereindescribed and claimed.

In: the use of disk phonograph records,

trouble is often experienced in locating. the

*beginningxof'the recording groove. This isespecially true where. phonographs are cated away from good light, a for instance, in an apartment building,- some distance "from the only window in the room. Many times the needleis placed on the record considerably within the outer groove, and time part hf'the selection is eliminated. On the other hand, ,it-frequently happens that the needle is placed-onthevery edge of the disk,

' readily seen and whichis of such size that the needle canbe readily placed therein, v A further bject of invinventmn is to provide aguide groove having an aux liary groove leading therefrom to the record grooves, so that the needle, having been located in the. guide groove, will find'its way automatically'tii the record grooves.

Other 'objectsan'd advantages will appear in the following specification, and the novel features "of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompa'nying drawings, forming part ofthis application, in which Figure 1 is aplan view-of the disk, Fig. 2 is a section along the line 2-2 of ig, 3 is a section along the line 3-3 of Fig.4, and

Fig. 4: is asection along the line 4:--4: of Fig. l. I

In carrying out my invention, Lmake use of the ordinary form of disk, such as that shown at 1. This is provided with the usual set ofgrooves 2 which reproduce the selection impressed thereon. Toward the outer edge of the disk 1- I'provide'a groove 3 which Specification oi Letters Patent.

Patented Mar. 29, 11921.

Application filed meme.- e; 1919.: serial no. ceases.

is of much greater width and depth than the ordinary grooves formed in the recording of the selection. In Fig. 2 I have shown a section of this: groove. The groove is colored with a distinctive color, so as to make it visi-. ble,'even ina darkened room. The groove may be white, or of some color to distinguish it readily from the black record. lhe guide groove 3 is circular, but at the point e I ,providean auxiliary groove 5 which bears inwardly and leads to the'recording grooves This-auxiliary groove, at its junction 'with the guide groove 3, is deeper than the guide groove, as shown in F 1g. 3, so that the needle will'dro'p into the auxiliary groove and be moved by it onto the recording grooves, the auxiliary groove 3 gradually becoming shallower as it approaches the recording grooves 2.

a jwiu be seen from Fig. 2, the bottom a the guide groove 3 is rounded, while that of theauxiliary groove 5 is ti-shaped, thereby insuring the movement of the needlefrom the guide groove to the V-shaped groove;

It will be understood that the depthsand widths of the guide groov'e 3 and the auze ilia'rygroove 5 are not drawn to a scale in the. drawings, the dimensions being pur; posely exaggerated for the purpose of'illiis tration.

ll .clairn. p 1.- A disk record having an outer circular guide groove, record grooves andan auxiliary groove connecting said guide groove with the record grooves.

' 2. A disk record having an. outer circular guide groove of a color contrasting with that of the record, recordgroove's and having an auxiliary guide groove leading from said guide groove to the record grooves.

31 A disk recordhaving record grooves, an outer circular guide groove, said guide groove being relatively wide, and an auxiliary groove leading from said guide groove and being connected with said record. grooves.

4. A disk record having acircular guide groove, record grooves, and an auxiliary groove leading from said guide groove and being connected with said record grooves, saidauxiliary'groove being deeper than the guide groove at. the point where it joins the lower from the guide groove to the record guide grooveand gradually becoming shal- 

